These power steering cylinders use the ships engine(s) to provide the power
for the steering system, via an engine or electric motor driven hydraulic pump.
Features effortless steering from docking to top speed.
SeaStar Power Steering provides super responsive automotive style steering
performance for todays large motor yachts. The SeaStar DC Power Steering
Unit is the heart of the system providing reliable and economical hydraulic flow
to the steering cylinder whenever the wheel is turned. Whether docking or
cruising at high speed, the system will deliver 100% power regardless of engine
speed.
SeaStars superior design and selection of materials, precision manufacturing
and rigid quality control all add up to an outstanding robust and versatile
system for all large boat applications.
Features
Highly responsive, effortless
steering performance at all speeds.
Low number of turns lock to lock (based on helm selection).
Few components to spec and install.
Semi-Auto purge feature.
Suitable for multi-station applications.
Integrated autopilot pump.
Suitable for use with most SeaStar helms (including tilt versions).
Automatic manual back up system.
KEY FEATURES
Easy to Spec and Install
Covers most power steering requirements. No need to determine required flow
rate, engine pump spec, engine connectivity. The system is economically powered
from the boats 24v supply.
Semi-Auto Purge
During service and/or installation a semi-auto purge feature is engaged
dramatically reducing installation time and air in the system.
Few Components
Totally self-contained, there is no longer any need to install separate filters,
coolers, engine pumps, flow control valves. The DC power unit covers all
requirements within one easy to install module.
100% Performance, 100% of the time
Provides the maximum required hydraulic oil flow, at all engine speeds.
On Demand Power
The DC Power Unit only draws power when a turn is initiated (typical duty time
5-10%). This ensures minimal power consumption, no wasted energy and longer
filter and motor life.
Integrated Autopilot Pump
The system includes a secondary pump with adjustable flow that can be controlled
by most autoplilot controllers
SELECTION GUIDE
*All boats over 70 should have steering loads reviewed by factory
| CYLINDER GUIDE |
DISPLACEMENT HULLS (STD) |
DISPLACEMENT HULLS (HEAVY DUTY) |
PLANING HULLS |
| Single 9 X 2 CYL (HC5801-2) |
Up To 50 (15m) |
Up To 40 (12m) |
Up To 65 (20m) |
| Twin 9 X 2 CYL (HC5802 & HC5801-2) |
Up To 75 (22m) |
Up To 55 (17m) |
Up To 85 (26m) |
| Single 11 X 2 CYL (HC5803-2) |
Up To 60 (18m) |
Up To 50 (15m) |
Up To 75 (23m) |
| Twin 11 x 2 CYL (HC5804 & HC5803-2) |
Up To 100 (31m) |
Up To 70 (22m) |
Up To 110 (34m) |
| *Single 9 X 2.5 CYL (HC5805) |
Up To 85 (26m) |
Up To 60 (18m) |
Up To 100 (31m) |
* 2.5 cylinder bore (Twin applications require conventional engine driven
pump power steering.)
| CYLINDER SPECIFICATION |
DISPLACEMENT |
BORE |
STROKE |
OUTPUT FORCE |
MAX. TORQUE (35° FROM CTR) |
| Single 9 X 2 CYL (HC5801-2) |
21.25 in³ (348cc) |
2.0 (51mm) |
9 (229mm) |
2946 lbsf (13,090 N) |
18,900 in-lbs (217kg/m) |
| Twin 9 X 2 CYL (HC5802 & HC5801-2) |
42.50 in³ (697cc) |
2.0 (51mm) |
9 (229mm) |
5892 lbsf (26,190 N) |
37,800 in-lbs (435kg/m) |
| Single 11 X 2 CYL (HC5803-2) |
26.00 in³ (426cc) |
2.0 (51mm) |
11 (280mm) |
2946 lbsf (13,090 N) |
23,140 in-lbs (266kg/m) |
| Twin 11 X 2 CYL (HC5804 & HC5803-2) |
52.00 in³ (853cc) |
2.0 (51mm) |
11 (280mm) |
5892 lbsf (26,190 N) |
46,280 in-lbs (533kg/m) |
| Single 9 X 2.5 CYL (HC5805) |
37.11 in³ (608cc) |
2.5 (64mm) |
9 (229mm) |
5154 lbsf (22,926 N) |
33,065 in-lbs (380kg/m) |
SEASTAR HELMS
| HELM DESCRIPTION |
PART NO. |
| SeaStar 1.4 Front Mount |
HH5269 |
| SeaStar 1.7 Front Mount |
HH5271 |
(Other Helm configurations also available inc Rear Mount, Tilts, etc)
| SYSTEM |
HC5801-2 |
HC5803-2 |
HC5805 |
| SeaStar 1.4 in³ |
4.3 turns |
5.3 turns |
4.3 turns |
| SeaStar 1.7 in³ |
3.6 turns |
4.4 turns |
3.6 turns |
Number of turns lock to lock (for a given helm/cyl combination)
| HOSES |
Helm to DC Power Unit
4 hoses required. 1x port, 1x starboard, 1x reservoir supply, 1x reservoir
return.
Port/Starboard lines: Use standard Seastar or Seastar Pro hoses, part
numbers HO51xx or HO71xx **.
Reservoir supply and return lines: Use standard Seastar, Seastar Pro, or
Seastar nylon tubing. |
DC Power Unit to Cylinder
4 hoses required. 1x port, 1x starboard, 1x high pressure supply, 1x low
pressure return.
Port/Starboard lines: Use standard Seastar or Seastar pro hoses Part number
HO51xx or HO71xx **
*High pressure supply line: Min 2000psi SAE 100R1 1/2 hose with SAE 45deg
-8 ends
*Low pressure return line: Min 300psi SAE 100R1 1/2 hose with SAE 45deg -8
ends
* (Not available from Teleflex) |
| **The use of Pro hose will improve steering response on all applications
and is highly recommended on high performance applications or those using
runs of 40 or more. Do not use nylon tubing for helm port and starboard
lines. 3/8 (max) copper tubing may be used for all helm lines. |
WARNING:
This product can expose you to chemicals including Di-n-hexyl Phthalate (DnHP)
which is known to the State of California to cause reproductive harm, and
Vinyl Chloride which is known to the State of California to cause cancer. For
more information go to 
